| Name | Saint Marys County |
| State | Maryland |
| FIPS Code | 24037 |
| County Seat | Leonardtown |
| Timezone | Eastern Standard Time (EST) |
| Population (2022) | 105,528 |
| Population Growth Rate(2000-2022) | 8.2% |
| Majority Ethnicity | White 81.26% |
| Public School Majority Ethnicity | White 60% |
| Partisan Voting Index | Republican:+7 |
| Unemployment Rate (December 2024) | 2.7% |
| Area Code(s) | 240 / 301 / 686 / 804 |
| Race/Ethnicity | Percentage of Population (2022) |
|---|---|
| White | 81.26% |
| African American | 15.92% |
| Hispanic | 0.06% |
| Asian | 2.75% |
| Native American | 0% |
| Hawaiin/Pacific Islander | 0% |
| Race/Ethnicity | Percentage of Public School Students (2023) |
|---|---|
| White | 60.5% |
| African American | 19.38% |
| Hispanic | 8.2% |
| Asian | 2.45% |
| Native American | 0.24% |
| Hawaiin/Pacific Islander | 0.17% |